Based on all that Ive heard,I think the pint cans will do. Im guessing any old paint brush will do the trick?I got a box with several disposable types.
It will if it's clean. Any leftovers on bristle will make the job harder because POR15 will gel quicker on a dirty brush. And expect to through the brush away after use.In my experience, POR15 won't clean off the bristles readily.